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arXiv 1401.6741astro-ph.EP
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木星在推动地球轨道演化中的作用

The role of Jupiter in driving Earth's orbital evolution

Jonathan Horner, Dave Waltham, F. Elliot Koch

摘要:

在未来的几年里,第一个真正的类地行星将被发现围绕其他恒星运行,寻找这些世界上的生命迹象将开始。然而,这样的观测将是非常耗时和昂贵的,因此确定这些行星中的哪一个代表了其他地方生命的最佳前景将是重要的。做出这样的决定的关键因素之一是所讨论的星球的气候变异性--过于混乱的气候可能会使一颗星球不太有希望成为我们最初在其他地方寻找生命的目标。在地球上,过去几百万年的气候主要是由一系列冰期和间冰期所控制的,这些冰期和间冰期是由地球轨道要素和轴向倾斜的周期性变化所驱动的。这些米兰科维奇循环是由其他行星的引力影响驱动的,因此强烈依赖于太阳系的结构。在这里,我们提出的第一个结果的研究调查木星的轨道上的米兰科维奇循环在地球上的影响-第一步,在开发一种手段,以解释周期性的气候变化的性质,我们的太阳系以外的行星。

英文摘要:

In coming years, the first truly Earth-like planets will be discovered orbiting other stars, and the search for signs of life on these worlds will begin. However, such observations will be hugely time-consuming and costly, and so it will be important to determine which of those planets represent the best prospects for life elsewhere. One of the key factors in such a decision will be the climate variability of the planet in question - too chaotic a climate might render a planet less promising as a target for our initial search for life elsewhere. On the Earth, the climate of the last few million years has been dominated by a series of glacial and interglacial periods, driven by periodic variations in the Earth's orbital elements and axial tilt. These Milankovitch cycles are driven by the gravitational influence of the other planets, and as such are strongly dependent on the architecture of the Solar system. Here, we present the first results of a study investigating the influence of the orbit of Jupiter on the Milankovitch cycles at Earth - a first step in developing a means to characterise the nature of periodic climate change on planets beyond our Solar system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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